condition mean min max 4 h after light 0.2673815 0.228166 0.306597 8 h after light 0.2247475 0.221791 0.227704 12 h after light 0.4707935 0.435954 0.505633 4 h after dark 2.001385 1.77093 2.23184 8 h after dark 1.85752 1.82715 1.88789 12 h after dark 1.16641 1.04639 1.28643